1996 GMC Suburban Owner's Manual - Page 332

Maintenance Schedule Short Trip/City Definition -- Gasoline Engines Follow the Short Trip/City Maintenance Schedule if any one of these conditions is true foryour vehicle: Most trips are less than 5 to 10 miles (8 to 16 km). This is particularly important when outside temperatures are below freezing. 0 Most trips include extensive idling (such as frequent driving in stop-and-go traffic). 0 You operate your vehicle in dusty areas or off-road frequently. You frequently tow a trailer or use a carrier on top of your vehicle. 0 If the vehicle is used for delivery service, police, taxi or other commercial application. One o th.e reasons you should follow this schedule if you f operute your vehicle under uny qf these conditiorzs is tlmt these conditions cause engine oil to break dmvn s o o ~ e ~ At 6,000 Miles (10 000 km) Then Every 12,000 Miles (20 000 km): Tire Rotation. Every 15,000 Miles (25 000 km): Shields and Underhood Insulation Inspection (GVWR above 8,500 lbs. only). Thermostatically Controlled Engine Cooling Fan Check (or every 12 months, whichever occurs first). Front Wheel Bearing Repack(2WD only) (or at each brake relining, whichever occurs first). Every 30,000 Miles (50 000 km): Fuel Filter Replacement. Every 50,000 Miles (83 000 km): Automatic Transmission Service (severe conditions only). Every 60,000 Miles (100 000 km): Engine Accessory Drive Belt Inspection. Fuel Tank, Cap and Lines Inspection. Exhaust Gas Recirculation System Inspection. Evaporative Control System Inspection. -- Short Trip/City Intervals -- Gasoline Engines Every 3,000 Miles (5 000 km): Engine Oil and Filter Change (or 3 months, whichever occurs first). Chassis Lubrication (or 3 months, whichever occurs first). Drive Axle Service (or 3 months, whichever occurs first). Every 100,000 Miles (166 000 km): Cooling System Service (or every 60 months, whichever occurs first). Spark Plug Wire Inspection. Spark Plug Replacement. Positive Crankcase Ventilation (PCV) Valve Inspection. These intervals only summarize wmintennnce services. Be mre to.follow the complete maintenance schedule on the~following pages. 7-4